SN4 ""

No	Pattern	Freq
31	it be to [adj] [noun]	90
32	it be [prep] [adj] importance	86
33	it be [prep] [adj] importance	86
34	it be about [adj] [noun]	77
35	it be during [adj] [noun]	73
36	it be [prep] great [noun]	68
37	it be [prep] [adj] way	65
38	it be [prep] great [noun]	63
39	it be against [adj] [noun]	62
40	it be [prep] any [noun]	61
41	it be [prep] any [noun]	61
42	it be [prep] [adj] stage	58
43	it be [prep] [adj] stage	55
44	it be [prep] [adj] context	52
45	it be [prep] [adj] context	52
46	it be [prep] [adj] [n mass]	50
47	it be [prep] such [noun]	47
48	it be [prep] such [noun]	47
49	it be [prep] [adj] sense	47
50	it be [prep] [adj] sense	46
51	it be through [adj] [noun]	44
52	it be [prep] [adj] [noun prp]	44
53	it be [prep] [adj] background	42
54	it be [prep] [adj] way	42
55	it be [prep] [adj] background	42
56	it be [prep] [adj] period	41
57	it be [prep] [adj] period	41
58	it be [prep] those [noun]	40
59	it be [prep] those [noun]	40
60	it be [prep] [adj] people	39